Figure 6.—

Crossing scheme used to optimize the rate of recombination around ui6.1. A substitution line containing a nearly intact S. pennellii chromosome 6 (Van Wordragen et al. 1996) was crossed to tomato cv. M-82. The resulting hybrid, heterozygous for the pennellii chromosome, was backcrossed as male (BC-♂) or female (BC-♀) parent to a line homozygous for the S-locus region from S. pennellii. Recombinants were identified by marker analysis in the two BC populations and then tested for compatibility of pollen on pistils of the allotriploid hybrid.